GB2477683A - Ventilation system for a motor vehicle, method for air conditioning a motor vehicle - Google Patents
Ventilation system for a motor vehicle, method for air conditioning a motor vehicle Download PDFInfo
- Publication number
- GB2477683A GB2477683A GB1108752A GB201108752A GB2477683A GB 2477683 A GB2477683 A GB 2477683A GB 1108752 A GB1108752 A GB 1108752A GB 201108752 A GB201108752 A GB 201108752A GB 2477683 A GB2477683 A GB 2477683A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fresh air
- fan
- ventilation system
- heat exchanger
- motor vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009423 ventilation Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 12
- 238000004378 air conditioning Methods 0.000 title 1
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 230000000630 rising effect Effects 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 230000001276 controlling effect Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 239000006200 vaporizer Substances 0.000 description 3
- 241001633942 Dais Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00764—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00828—Ventilators, e.g. speed control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to a ventilation system for a passenger compartment (12) of a motor vehicle (2) comprising a fresh air inlet (6), a heat exchanger (14) for heating and/or cooling the supplied fresh air (8), a fan (10) having adjustable power for creating a fresh air flow into the passenger compartment (12), a speed sensor (20) for determining a current vehicle speed (v) and/or a pressure sensor, a temperature specification device (18) and a control and/or regulation device (16) for controlling and/or regulating the heat exchanger (14) and the fan (10), wherein the control and/or regulation device (16) is designed to lower the power of the fan (10) and to increase and/or lower the heat volume given off or taken up by the heat exchanger to the fresh air (8) with rising vehicle speed (v) and/or rising dynamic pressure.
Description
I
S Ventilation systa for a motor vehicle, method for climate control f a motor vehicle Technical Area The invention relates to a ventilation system for a passenger compartment of a motor vehicle, which contains a plurality of components which interact with one another, Inter alIa, a fresh air supply, a heat exchanger, a fan, and a control or regulating device for controlling or regulating the components of the ventilation system which can be controlled or regulated.
Prior Art
Ventilation systems of the type mentioned at the beginning are known in the prior art. In particular, it is known in the prior art that in motor vehicles at higher velocities, for example, above 130 km/h, a ram pressure arises in the area of fresh air supplies for supplying fresh air for the passenger compartment, which has the result that more air enters the ventilation system than at lower velocities. This has the result that a higher volume stream of air reaches the vehicle interior. In heating operation, the vehicle therefore heats up additionally at high velocities, since more air flows past the heat exchanger of the ventilation system. In cooling operation, i.e., when the air conditioner is turned on, more cold air flows into the interior, which can result in noticeable and unpleasant cooling of the interior.
In order to counteract this effect, various approaches are known in the prior art. Thus, it is first generally known that a fan power is adapted as a function of the velocity, i.e., the fan power is throttled at higher velocities.
In addition, providing mechanical throttles in the fresh air supply is known in the prior art, which constrict the cross-section of the fresh air supply at higher velocities and thus keep the volume stream of supplied fresh air essentially consistent. Such systems are known, for example, from DE 103 49 429 Al and from DE 44 14 036 Al, which show different designs of such a ram air throttle.
However, the above-described systems have the disadvantage that they may be the cause of noises in the air intake area at high velocities and the narrow ventilation cross-sections required for this purpose. In addition, such a solution requires an additional mechanical element which is in need of control, and which can be the cause of defects, on the one hand, and additionally increases the production costs.
In addition, a solution is known from DE 197 56 346 Al, which mechanically seals off an air intake opening against a relatively high ram pressure and simultaneously causes an air supply from an area in which a relatively lower pressure prevails during travel. However, this requires the provision of a plurality of air intake openings or one relatively large air intake opening, which allows the provision of such devices.
Problem The problem thus results of improving a ventilation system of the type mentioned at the beginning in such a way that it manages without requiring further active or passive mechanical elements in the ventilation system, which control the air -n 14 4 +--I 1 p a -rn-t, 4 p F ant r' I 4 F a ean F pa I a c s-in a The fan can be situated between fresh air supply and heat exchanger or between heat exchanger and passenger compartment or in a branch of the heat exchanger.
----.-------% -According to the invention, the control and/or regulating device is implemented for the purpose of reducing the power of the fan in the event of rising vehicle velocity and/or rising ram pressure, and increasing or reducing the quantity of heat output or absorbed by the heat exchanger, depending on whether or not an air conditioner is installed.
With the aid of the invention, a higher ram pressure can first be compensated for by a reduction of the fan power, so that a consistent volume stream of heated or cooled fresh air is supplied to the vehicle interior, If the reduction of the fan power is insufficient to keep the interior climate consistent at high velocities, it is further possible with the aid of the invention to compensate for a necessarily higher volume stream of supplied fresh air in that the heating or cooling power is adapted.
If the ventilation system is in heating operation, the heating power of the heat exchanger is throttled and the fresh air is heated less strongly at high velocities than at low velocities.
In this way, the heating power can be regulated in such a manner that the vehicle does not additionally heat up at high velocities.
In the reverse case, i.e., in cooling operation, the cooling power can be set via the power of the heat exchanger, for example, a vaporizer of an air conditioner, in such a way that the fresh air is not so strongly cooled at high velocities that the interior is cooled below the predefined temperature.
The control and/or regulating device can be a component of an onboard computer of the motor vehicle or a central vehicle control unit.
With the aid of the invention, control or regulation of the temperature of a passenger compartment can thus be achieved in a simnip way withnnt the nrnviinn Of further mechanical achieved that an ambient humidity of the supplied fresh air can be reduced with the aid of the vaporizer, so that fogging of the I I nAr*ac nf s-h mnt-in r -I r 1 a F rinm F ha I n c 4 na r n ha nratran s-temperature, so that the feeling of a draft is avoided. The temperature of the fresh air is to deviate just strongly enough that coolino of the vehicle interior or heatino thereof by the the fan in the event of rising vehicle velocity and increasing and/or reducing the quantity of heat discharged and/or absorbed 4. k -. t n n rr F rryn F r 4 v r pnn,'f 4 tr 1, a function of a temperature specification and the ram pressure and/or the vehicle velocity. In this way, a consistent interior climate control can also be achieved in the event of high velocities without the necessity of an additional mechanical device which reduces ram pressure.
The method has the special advantage that it may be implemented in the form of an algorithm, for example, as a correction factor, which is a function of a vehicle velocity or a ram pressure.
In particular if the vehicle velocity is used to calculate the correction factor, sensors provided in every vehicle can be employed.
A refinement of the method according to the invention provides that an interior temperature of the passenger compartment is recorded as a starting value, With the aid of such a starting temperature, a required quantity of heat, which must be supplied to or withdrawn from the interior until a preselected interior temperature is reached, can be calculated.
A refinement of the invention provides that the setting of the power of the fan and the increase and/or reduction of the quantity of heat discharged to or absorbed from the fresh air by the heat exchanger is performed as a function of a time since startup of the vehicle and/or the last detection of the interior temperature. More complex control programs which offer special comfort may thus be implemented.
A further refinement of the invention provides that in the event of rising velocity or rising ram pressure, the power of the fan is first set or reduced to a minimum power, the minimum power possibly meaning a power having low air throughput or complete deactivation of the fan and then, when the power of the fan has been set to a minimum, the quantity of heat discharged to or absorbed from the fresh air by a heat exchanger is increased or reduced.
In heating operation, when the fresh air to be supplied is heated, the heat discharge of the heat exchanger is preferably reduced, or the heat withdrawal or cooling of the fresh air is $0 reduced in cooling operation.
Further goals, features, and advantageous possible applications of the invention result from the following description of an exemplary embodiment on the basis of the drawings. All features which are described and/or shown in the figures form the subject matter of the present invention in the reasonable combination thereof, even independently of the patent claims and the references thereof.
Brief Description of the Figures
The invention will be explained on the basis of an exemplary embodiment. In the figures: Figure 1 shows a motor vehicle having a ventilation system according to the invention and Figure 2 shows a flowchart of the method according to the invention for controlling the ventilation system.
Exemplary Embodiment Figure 1 shows a motor vehicle 2 having a ventilation system 4 according to the invention.
The ventilation system 4 has a fresh air supply 6, via which the fresh air 8 reaches the ventilation system 4. A settable fan 10 is used to generate a predefined volume stream of fresh air into an interior 12 of the motor vehicle, in which passengers are located. The fresh air 8 is heated or cooled as needed, or both simultaneously, for example, to dry the fresh air 8, with the aid of a heat exchanger 14. Subsequently, the heated or cooled fresh air 8 is conducted into the interior 12.
The heat exchanger 14 has a vaporizer of an air conditioner and a heat exchanger for discharging engine heat to the fresh air 8.
A control and/or regulating device 16 is used to control the fan and the heat exchanger 14. For this purpose, the control and/or regulating device 16 receives a temperature specification via a temperature selection switch 18, which is typically situated in the interior 12 of the motor vehicle 2.
A velocity sensor 20, as is required for a speedometer of the motor vehicle 2 in any case, for example, and which detects the angular velocity of a wheel of the motor vehicle 2, for example, is also connected to the control and/or regulating device 16.
The control and/or regulating device 16 is further connected to an external temperature sensor 22 and an interior temperature sensor 24.
The control and/or regulating device 16 calculates a required fan power of the fan 10 using an algorithm and calculates a quantity of heat to be discharged or absorbed using the heat exchanger 14 using a velocity-dependent correction factor on the basis of the temperature, which is preselected by the temperature selection switch 18, and an interior temperature, which the control and/or regulating device 16 measures with the aid of.the interior temperature sensor 24, the external S temperature, and the velocity of the vehicle.
Figure 2 shows a flowchart to illustrate the method according to the invention.
In a first step 40, the motor vehicle 2 is started. In a second step 42, the interior temperature is detected. In a step 44, a temperature specification using the temperature selection switch 18 is then detected, and an external temperature is detected in a step 46. A required quantity of heat to be supplied or dissipated is calculated with the aid thereof (step 48) A velocity V of the vehicle is detected simultaneously and continuously in step 50. With the aid of the detected velocity, settings of the fan 10 and the heat exchanger 14 are calculated in step 52 and fan 10 and heat exchanger 14 are set correspondingly. If the velocity is greater than a limiting velocity, the fan voltage is reduced according to step 56.
If the velocity rises further, a further reduction of the fan voltage is performed until the fan 10 is completely turned of f.
The heat discharge or absorption of the heat exchanger 14 is then reduced or increased according to a correction factor.
The method is repeated continuously or at predefined intervals.
List of reference numerals 2 motor vehicle 4 ventilation system 6 fresh air supply 8 fresh air fan 12 interior 14 heat exchanger 16 control and/or regulating device 18 temperature selection switch velocity sensor 22 exterior temperature sensor 24 interior temperature sensor to 60 method steps V velocity dais.
Claims (11)
1. A ventilation system for a passenger compartment (12) of a motor vehicle (2) having a fresh air supply (6), a heat exchanger (16) for heating and/or cooling the supplied fresh air (8), a fan (10) having settable power to generate a fresh air stream in the passenger compartment (12), a velocity sensor (20) to establish a current vehicle velocity (v), and/or a pressure sensor to ascertain a ram pressure of the fresh air (8), a temperature specification device (18) for specifying a desired temperature in the passenger compartment (12), iS and a control and/or regulating device (16) for controlling and/or regulating the heat exchanger (16) and the fan (10), characterized in that the control and/or regulating device (16) is implemented to reduce the power of the fan (10) and to increase and/or reduce the quantity of heat discharged to or absorbed from the fresh air (8) by the heat exchanger in the event of rising vehicle velocity (v) and/or rising ram pressure.
2. The ventilation system according to Claim 1, which further has at least one interior temperature sensor (24) to ascertain a passenger compartment temperature.
3. The ventilation system according to Claim 2, characterized in that the control and/or regulating device (16) is implemented to detect the passenger compartment temperature as a starting value using the interior temperature sensor (24).
4. The ventilation system according to one of the preceding claims, further having an external temperature sensor (22), which is connected to the control and/or regulating device, and/or a fresh air temperature sensor, which is S connected to the control and/or regulating device (16), and/or a timer.
5. The ventilation system according to one of the preceding claims, characterized in that the control and/or regulating device (16) is implemented for the purpose, in the event of increasing vehicle velocity (v) or increasing ram pressure, of first reducing the power of the fan (10), preferably until the fan (10) is turned of f, and then, preferably when the fan (10) is turned IS of f, of increasing and/or reducing the quantity of heat discharged or absorbed by the heat exchanger (14).
6. A control and/or regulating device (16) for a ventilation system (4) of a motor vehicle (2) according to one of the preceding claims.
7. A motor vehicle (2) having a ventilation system (4) according to one of Claims 1 to 5.
8. A method for controlling and/or regulating a ventilation system (4) of a motor vehicle (2), in particular a ventilation system (4) according to one of Claims 1 to 5, in which a ram pressure and/or a vehicle velocity (v) of the motor vehicle (2) is measured and a power of a fan (10) for generating a fresh air stream in a passenger compartment (12) of the motor vehicle (2) is set and an increase or reduction of the quantity of heat discharged to or absorbed from the fresh air by a heat exchanger (14) is performed as a function of a temperature specification and the ram pressure and/or the vehicle velocity (v).
9. The method according to Claim 8, characterized in that an interior temperature of the passenger compartment (12) is recorded as a starting value.
10. The method according to Claim 8 or 9, characterized in that the setting of the power of the fan (10) and the increase and/or reduction of the quantity of heat discharged to or absorbed from the fresh air by the heat exchanger (14) is performed as a function of a time since the startup of the motor vehicle (2) and/or the last detection of the interior temperature.
11. The method according to one of Claims 8 to 10, characterized in that, in the event of rising velocity Cv) and/or rising ram pressure, the power of the fan (10) is first set to a minimal power, preferably no power, and an increase or reduction of the quantity of heat discharged to or absorbed from the fresh air (8) by a heat exchanger (14) is then performed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008059886A DE102008059886A1 (en) | 2008-12-03 | 2008-12-03 | Ventilation system for a motor vehicle, method for air conditioning a motor vehicle |
| PCT/EP2009/008517 WO2010063435A1 (en) | 2008-12-03 | 2009-11-30 | Ventilation system for a motor vehicle, method for air conditioning a motor vehicle |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201108752D0 GB201108752D0 (en) | 2011-07-06 |
| GB2477683A true GB2477683A (en) | 2011-08-10 |
| GB2477683B GB2477683B (en) | 2013-09-18 |
Family
ID=41692056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1108752.5A Expired - Fee Related GB2477683B (en) | 2008-12-03 | 2009-11-30 | Ventilation system for a motor vehicle, method for climate control of a motor vehicle |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20110244776A1 (en) |
| CN (1) | CN102307740A (en) |
| DE (1) | DE102008059886A1 (en) |
| GB (1) | GB2477683B (en) |
| WO (1) | WO2010063435A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010041440A1 (en) * | 2010-09-27 | 2012-03-29 | Siemens Aktiengesellschaft | Vehicle with a cooled by means of a cooling air mass flow component |
| DE102010056159A1 (en) | 2010-12-24 | 2012-06-28 | Volkswagen Ag | Method for controlling fan i.e. fresh-air fan, of vehicle i.e. passenger car, involves detecting reference information for fan volume flow, detecting actual driving speed of vehicle and controlling fan based on information and speed |
| US8939823B2 (en) * | 2011-02-21 | 2015-01-27 | Honda Motor Co., Ltd. | Vehicle HVAC system with ram pressure control |
| DE102014214164B4 (en) | 2014-07-21 | 2021-12-02 | Volkswagen Aktiengesellschaft | Method for air conditioning an interior of a motor vehicle |
| KR101858698B1 (en) * | 2016-01-04 | 2018-05-16 | 엘지전자 주식회사 | Display apparatus for vehicle and Vehicle |
| DE102016014028B4 (en) * | 2016-11-24 | 2021-09-09 | Daimler Ag | Method and vehicle air conditioning system for ventilating a vehicle interior |
| US10150348B2 (en) | 2016-12-27 | 2018-12-11 | Cnh Industrial America Llc | Airflow control system of a work vehicle |
| CN107176010A (en) * | 2017-05-31 | 2017-09-19 | 太仓市高泰机械有限公司 | A kind of circumscribed ventilation unit of anti-in-car high temperature |
| DE102017213442A1 (en) | 2017-08-02 | 2019-02-07 | Bayerische Motoren Werke Aktiengesellschaft | Recirculation mode depending on seat occupancy detection |
| CN110315926B (en) * | 2018-03-29 | 2023-09-15 | 宝马股份公司 | Air conditioning apparatus, method of adjusting the same, vehicle, and computer-readable storage medium |
| US11150669B2 (en) * | 2019-06-10 | 2021-10-19 | Pony Ai Inc. | System and method for regulating a sensor enclosure |
| US11220154B2 (en) * | 2019-06-10 | 2022-01-11 | Pony Ai Inc. | System and method for controlling heat exchange in a sensor enclosure |
| US11592528B2 (en) * | 2019-07-01 | 2023-02-28 | Pony Ai Inc. | System and method for controlling an airflow into a sensor enclosure |
| CN110395087B (en) * | 2019-07-31 | 2023-06-20 | 福建省汽车工业集团云度新能源汽车股份有限公司 | Vehicle-mounted intelligent air conditioner control method and system based on fuzzy PID control |
| DE102020101461B4 (en) | 2020-01-22 | 2022-01-20 | Audi Aktiengesellschaft | Motor vehicle with a ventilation device and method for operating a ventilation device |
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| DE10132891A1 (en) * | 2001-07-06 | 2003-01-16 | Daimler Chrysler Ag | Air conditioning device, for vehicle, has fan adjusted depending on vehicle speed and opening positions so air outlet speed from air outlet nozzles is substantially constant |
| WO2003106215A1 (en) * | 2002-06-12 | 2003-12-24 | Daimlerchrysler Ag | Air supplying device for a vehicle seat |
| US20060196634A1 (en) * | 2005-02-18 | 2006-09-07 | Nissan Motor Co., Ltd. | Vehicle cooling system |
| WO2008078186A1 (en) * | 2006-12-26 | 2008-07-03 | Toyota Jidosha Kabushiki Kaisha | Vehicular air-conditioning system and control method of same |
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-
2008
- 2008-12-03 DE DE102008059886A patent/DE102008059886A1/en not_active Withdrawn
-
2009
- 2009-11-30 GB GB1108752.5A patent/GB2477683B/en not_active Expired - Fee Related
- 2009-11-30 WO PCT/EP2009/008517 patent/WO2010063435A1/en active Application Filing
- 2009-11-30 US US13/132,567 patent/US20110244776A1/en not_active Abandoned
- 2009-11-30 CN CN2009801560012A patent/CN102307740A/en active Pending
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|---|---|---|---|---|
| DE10132891A1 (en) * | 2001-07-06 | 2003-01-16 | Daimler Chrysler Ag | Air conditioning device, for vehicle, has fan adjusted depending on vehicle speed and opening positions so air outlet speed from air outlet nozzles is substantially constant |
| WO2003106215A1 (en) * | 2002-06-12 | 2003-12-24 | Daimlerchrysler Ag | Air supplying device for a vehicle seat |
| US20060196634A1 (en) * | 2005-02-18 | 2006-09-07 | Nissan Motor Co., Ltd. | Vehicle cooling system |
| WO2008078186A1 (en) * | 2006-12-26 | 2008-07-03 | Toyota Jidosha Kabushiki Kaisha | Vehicular air-conditioning system and control method of same |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110244776A1 (en) | 2011-10-06 |
| GB2477683B (en) | 2013-09-18 |
| GB201108752D0 (en) | 2011-07-06 |
| CN102307740A (en) | 2012-01-04 |
| DE102008059886A1 (en) | 2010-06-10 |
| WO2010063435A1 (en) | 2010-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20171130 |